Caption: Normally I hide when it is hot and humid like so many July days are. I guess this must have been a cool and humid one. Anyway, up at Dundas, awaiting the #725 Hamilton to Nanticoke steel train; and was rather surprised to see it under control of three GP9s. On this day the power was CN 4125, 4121 and 4537. In a few short weeks the first two units would be renumbered into the 4300 series; but the last survived as is until around 1993. I thought the A-B-A series that powered this train must be finished, but they did return, as I saw various steel trains with As or Bs off and on up until late 1986.